Envelope Order Tracking Analysis of Rolling Elements Bearing Faults Based on Spectral Kurtosis

PDF(1337 KB)

Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (17) : 149-153.

论文

Envelope Order Tracking Analysis of Rolling Elements Bearing Faults Based on Spectral Kurtosis

LIU Tingwei-wei , GUO Yu,LI Bing , GAO Yan

Author information +

History +

Abstract

Through the research on the gearbox vibration signals at the variable speed conditions of rotating machinery, a method of envelope order tracking analysis of rolling elements bearing faults based on the spectral kurtosis is proposed in this paper. It’s known that the impact vibration produced by rolling elements bearing faults will excite the resonances of its or its surrounding structure. The method proposed in this paper can use the spectral kurtosis algorithm to obtain both the optimal center frequency and bandwidth of the band-pass filter in envelope analysis adaptively. Then the envelope signal that contain the vibration features of the initial stage of the rolling elements bearing faults can be gained. Consequently, the envelope signal is resampled by even-angle sampling, so that the non-stationary signal in time-domain can be turned into a quasi-stationary signal in angle-domain. As a result the frequency smear can be eliminated in order spectrum and the fault diagnosis of rolling elements bearing on the variable speed conditions of rotating machinery is achieved. Simulations and tests verified the feasibility of the proposed method.

Key words

Rotating Machinery / Variable Speed conditions / Envelope Analysis / Order Tracking / Spectral Kurtosis

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

LIU Tingwei-wei;GUO Yu;LI Bing;GAO Yan . Envelope Order Tracking Analysis of Rolling Elements Bearing Faults Based on Spectral Kurtosis[J]. Journal of Vibration and Shock, 2012, 31(17): 149-153